(*
 * Copyright (c) 2009, Palle Raabjerg
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   * Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *)

{
  open Printf
  open Spiparser
}

let id = ['a'-'z'] ['a'-'z' 'A'-'Z' '0'-'9']*
let logvar = ['A'-'Z'] ['a'-'z' 'A'-'Z' '0'-'9']*

rule spi_tokens = parse
  | [' ' '\t' '\n'] { spi_tokens lexbuf } (* Skip whitespaces *)
  | "begin"    { BEGIN }
  | "end"      { END }
  | '!'        { BANG }
  | '|'        { PAR }
  | "nil"      { NIL }
  | "ok"       { OK }
  | '('        { LPAREN }
  | ')'        { RPAREN }
  | '{'        { LBRACE }
  | '}'        { RBRACE }
  | ':'        { COLON }
  | ';'        { SCOLON }
  | ','        { COMMA }
  | "-"        { DASH }
  | "out"      { OUT }
  | "in"       { IN }
  | "new"      { NEW }
  | "decrypt"  { DECRYPT }
  | "split"    { SPLIT }
  | "match"    { MATCH }
  | "expect"   { EXPECT }
  | "as"       { AS }
  | "pair"     { PAIR }
  | "Ch"       { CHAN }
  | "Un"       { UN }
  | "Key"      { KEY }
  | "Ok"       { TOK }
  | "Pair"     { TPAIR }
  | '*'        { UNKNOWN }
  | "Empty"    { EMPTY }
  | id as str  { ID str }
  | logvar as str { LVAR str }
  | _ as c     { printf "Unrecognized character: %c\n" c; CHAR c}
  | eof        { raise End_of_file }
